Quick answer
The Post Lunch Blood Sugar Test (PLBS / PPBS) costs ₹80 at Live Line Health Care. Checks blood sugar 2 hours after a normal meal. No fasting is needed. It uses a blood sample and the report is usually ready the same day. Book home sample collection or visit any of our 45 centres.
Also known as: PLBS, PPBS, Post Prandial Blood Sugar, Postprandial Glucose, PP Sugar, Post Meal Sugar, 2 Hour Post Lunch Sugar, Glucose PP
What is the Post Lunch Blood Sugar Test?
The Post Lunch Blood Sugar test, also written as PLBS or PPBS (post prandial blood sugar), measures your glucose exactly 2 hours after you start a normal meal. After eating, blood sugar rises and the pancreas releases insulin to bring it back down. In a healthy person, the level is usually below 140 mg/dL by the 2 hour mark. If the body does not make enough insulin or does not respond to it well, the sugar stays high for longer.
This test is most useful for people who already have diabetes, because high sugar after meals is common even when the fasting reading looks fine. It helps doctors decide whether medicines taken with meals, or the meals themselves, need changing. Timing is the key: a sample taken at 90 minutes or 3 hours will give a different answer, so the clock starts with your first bite. If you also need a fasting value, the combined FBS and PLBS test covers both in one booking. For a formal diagnosis, doctors rely on fasting sugar, HbA1c or a glucose tolerance test rather than a post lunch reading alone.
What it measures: The level of glucose in your blood 2 hours after the start of a normal meal.
Parameters included (1)
- Post Prandial Plasma Glucose, 2 hours (mg/dL)
Why is this test done?
- Checking how well diabetes is controlled after meals
- Adjusting diabetes medicines or insulin taken with meals
- Finding high sugar after meals when fasting sugar is normal
- Following up a borderline fasting sugar or HbA1c
- Checking the effect of diet changes on blood sugar
When should you get tested?
- Feeling sleepy, tired or foggy after meals
- Diabetes with a good fasting sugar but a high HbA1c
- Thirst and frequent urination later in the day
- A family history of diabetes or a past diabetes in pregnancy
- A recent change in diabetes medicines
How to prepare for the Post Lunch Blood Sugar Test
- 1Eat your usual lunch or breakfast, not a lighter or heavier meal than normal, and note the time you take the first bite.
- 2Give the sample exactly 2 hours after that first bite. Arrive a little early so the timing is not missed.
- 3Do not eat, chew gum, or have tea with sugar, juice or sweets during the 2 hours. Plain water is fine.
- 4Take your diabetes medicines with the meal as you usually do, unless your doctor says otherwise.
- 5Sit quietly while you wait; a brisk walk can lower the reading.
Post Lunch Blood Sugar Test normal range
| Parameter | Typical reference range |
|---|---|
| Normal | Below 140 mg/dL |
| Higher than normal | 140–199 mg/dLusually followed up with HbA1c or a glucose tolerance test |
| Suggests diabetes | 200 mg/dL or higherneeds confirmation |
| Common target for people with diabetes | Below 180 mg/dLyour doctor may set a different target |
These cut-offs come from the 2 hour glucose tolerance test. A meal varies more than a fixed glucose drink, so a post lunch value guides your doctor but does not diagnose diabetes on its own. Ranges are typical adult values and vary between labs, age and sex. Always use the range printed on your report and discuss results with your doctor.
Understanding your results
- A value below 140 mg/dL means your body cleared the sugar from that meal normally.
- A value of 140 to 199 mg/dL in someone without diabetes suggests the body is struggling. Your doctor may advise HbA1c or a glucose tolerance test.
- In people with diabetes, readings often above 180 mg/dL after meals usually mean treatment or diet needs review, even when the fasting sugar is normal.
- A post lunch sugar lower than the fasting value can happen if the meal was small or the sample was late. Your doctor may ask you to repeat it.
Health packages that include this test
The Post Lunch Blood Sugar Test is included in these full body checkups:
Book the Post Lunch Blood Sugar Test in your city
Same price at all 45 centres. Choose your city for local centres and timings.
Telangana
Post Lunch Blood Sugar Test – FAQs
What is the price of the Post Lunch Blood Sugar Test?
The Post Lunch Blood Sugar Test (PLBS / PPBS) costs ₹80 at Live Line Health Care, at all 45 centres and for home sample collection.
When exactly should the post lunch sugar sample be taken?
Exactly 2 hours after you start eating, not after you finish. If you began lunch at 1:00 PM, the sample should be taken at 3:00 PM. Arriving too early or too late changes the result. Tell the staff your start time.
Are PLBS and PPBS the same test?
Yes. PLBS means post lunch blood sugar and PPBS means post prandial blood sugar, which means after a meal. The meal can be breakfast or lunch. What matters is that it is a normal meal and the sample is taken 2 hours after you start eating.
What is a normal post lunch sugar level?
In people without diabetes, the 2 hour value is usually below 140 mg/dL. For people with diabetes, many doctors aim for less than 180 mg/dL. A value of 200 mg/dL or higher suggests diabetes, but it should be confirmed with other tests.
Should I take my diabetes tablets before the post lunch test?
In most cases yes, take them with the meal as you normally would, because the test shows how well your usual routine works. If your doctor wants a different arrangement for a particular check, follow their advice. Do not skip insulin without asking your doctor.
Why is my post lunch sugar high when fasting sugar is normal?
This is common in early diabetes and prediabetes, when the body cannot release enough insulin quickly after a meal. Large portions of rice, sweets or sugary drinks can also cause it. HbA1c gives a wider picture, and your doctor can advise on diet and treatment.
Can I walk during the 2 hours after lunch?
It is best to stay at rest. Physical activity uses glucose and can lower the reading, so the result may look better than your usual pattern. Light movement is fine, but avoid a brisk walk or exercise during the wait unless that is part of your normal routine.
Where can I get the Post Lunch Blood Sugar Test done?
At any of our 45 Live Line Health Care centres in 40 cities across Andhra Pradesh and Telangana, including Hyderabad, Visakhapatnam, Warangal, Kakinada and Nellore, or book home sample collection.
Medical disclaimer: This information is for general awareness only and is not a substitute for professional medical advice. Please consult a qualified doctor to interpret your results and before starting or changing any treatment.